• Arachnids are a class of joint-legged invertebrates in the subphylum Chelicerata.
  • They live mainly on land but are also found in fresh water and in all marine environments, except for the open ocean.
  • There are over 100,000 named species, including many species of spiders, scorpions, daddy-long-legs, ticks, and mites.
  • There may be up to 600,000 species in total, including unknown ones.
  • Use the resource below to answer the questions that follow.
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